/Engine/Source/Editor/EditorStyle/Public/EditorStyleSet.h
Concatenates two FNames.e If A and B are "Path.To" and ".Something" the result "Path.To.Something".
NewFNamethat is A concatenated with B.
static [FName](API\Runtime\Core\UObject\FName) Join ( [FName](API\Runtime\Core\UObject\FName) A, const ANSICHAR * B )